He decided to devote all his time and effort______scientific investigation.

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问题 He decided to devote all his time and effort______scientific investigation.

选项 A、in
B、on
C、from
D、to

答案D

解析 devote one’s time／life／energy…to(doing)sth．为固定搭配，意为“把某人的时间／生命／精力……奉献给(做)某事，致力于”。故选D。

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